Maintenance; Securing The Device; Battery Replacement - Benning CM E1 Bedienungsanleitung

- Open the measuring clamp and clamp the earthing conductor/earth connection to be tested. Let the
jaws of the measuring clamp snap together again several times.
- The measured value of the earth loop resistance can be read on the digital display B.
Note:
- During self-calibration, do not place the measuring clamp 1 around a conductor or open the measuring
clamp.
- If self-calibration does not stop, check whether the metallic contact surfaces inside the clamp are free
of dust and contamination.
- If interfering signals (current >3 A, voltage >30 V) are detected during the measurement, the "NOISE"
symbol F appears on the digital display 4 and the measurement might be affected.
- If the clamp was not closed correctly during the measurement, the
digital display 4 .
see fig. 3: Earth loop resistance measurement
8.3 AC current/ leakage current measurement
Do not exceed the maximum permitted voltage with respect to earth potential!

Electrical danger!
- Use the rotary switch 3 of the BENNING CM E1 to select the desired function mA or A.
- Open the measuring clamp 1 and clamp the earthing conductor/earth connection to be tested.
- The measured value of the leakage current can be read on the digital display B.
see figure 4: AC current/ leakage current measurement

9. Maintenance

Before opening the BENNING CM E1, strictly observe that the device is free of voltage!

Electrical danger!

9.1 Securing the device

Under certain circumstances, safe operation of the BENNING CM E1 might no longer be ensured, e.g. in
case of:
- visible damage of the casing.
- incorrect measuring results,
- recognizable consequences of prolonged storage under inadmissible conditions and
- recognizable consequences of extraordinary stress due to transport.
In such cases, immediately switch off the BENNING CM E1, disconnect it from the measuring points and
secure it against further use.
9.2 Cleaning
Clean the exterior of the device with a clean dry cloth (exception: special cleaning wipers). Do not use any
solvents and/or abrasives to clean the device. Make sure that the battery compartment and the battery
contacts are not contaminated by leaking battery electrolyte.
If there are electrolyte contamination or white deposits in the area of the battery or the battery compart-
ment, clean these areas as well by means of a dry cloth.

9.3 Battery replacement

Before opening the BENNING CM E1, strictly observe that the device is free of voltage!

Electrical danger!
The BENNING CM E1 is fed by a 9 V block battery.
The battery must be replaced (see fig. 5) when the battery symbol
the BENNING CM E1 is switched on, a battery test is carried out.
Proceed as follows to replace the battery:
- Switch off the BENNING CM E1.
- Put the BENNING CM E1 face down and unscrew the screws of the bottom part of the housing.
- Lift the bottom part of the housing off the front part.
- Lift the discharged battery from the battery compartment and disconnect the battery supply lines from
the battery.
09/ 2019 BENNING CM E1
symbol G appears on the
H appears in the display 4 . When
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